Unlocked Samsung Xplorer B2100 Solid Extreme Anti-Shock Waterproof Quad-Band Phone Red -International version with Embedded Flashlight Unlocked Quadband GSM: 850 / 900 / 1800 / 1900 Works on any GSM network, worldwide. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint Extended Memory: microSD (TransFlash) card slot (up to 8GB) Shock, water and dust resistant (IP57, MIL-STD-810F) Anti-shock materials (urethane) Noise cancellation with dedicated microphone Unlocked cell phones are compatible with GSM carriers such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information.